Korg's original Mono/Poly, released in 1981, was a monophonic/polyphonic behemoth that was popular worldwide. It provided four oscillators, a resonant filter, dual EGs and Modulation Generators, plus 4-way Synchro and Cross Modulation capability for creating aggressive and signature tonal effects. Mono/Poly was reborn as software as part of Korg's Legacy Collection - Analog Edition 2007.

The new Mono/Poly for Reason is a software version specially developed for Propellerhead's Rack Extension Plugin format for Reason. In addition to faithfully replicating the original sounds, the Mono/Poly for Reason also adds enhancements such as 128-voice polyphony (max), up to 16-voice unison, Mono/Poly up to date for use in modern music production.

Beyond perfectly reproducing the original, this version of Mono/Poly also greatly extends its sound-creating potential. An eight virtual patch matrix lets users route 159 modulation sources to modulate 35 destinations for creating complex, diverse sounds. Two integrated multi-effects and an arpeggiator deliver modern performance power and flexibility.

The software interface provides reorganized knobs and switches that resurrect the MonoPoly in a contemporary "rack-mountable" form for intuitive operation and sound-creating versatility.